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Related Concept Videos

Skin Cancer01:30

Skin Cancer

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Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
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Renewal of Skin Epidermal Stem Cells01:12

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The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
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Cancer Prevention02:59

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Combination Therapies and Personalized Medicine02:50

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Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
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Cancer-Critical Genes II: Tumor Suppressor Genes01:05

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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Related Experiment Video

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Cell Population Analyses During Skin Carcinogenesis
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Cell Population Analyses During Skin Carcinogenesis

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A genetically informed study reveals modifiable pathways in skin cancer.

Huan Qian1, Ruicheng Gong2, Yingjun Li2

  • 1Department of Plastic Surgery, The Second Affiliated Hospital, Medical School, Zhejiang University, Hangzhou, China.

Journal of Translational Medicine
|October 8, 2024
PubMed
Summary

This study used Mendelian randomization to identify causal risk factors for skin cancer. Sunburns and prior skin conditions increase risk, while vitiligo may be protective, offering new insights for skin cancer prevention.

Keywords:
Basal cell carcinomaMelanomaMendelian randomizationModifiable factorSquamous cell carcinoma

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Area of Science:

  • Genetics and Epidemiology
  • Cancer Research
  • Public Health

Background:

  • Identifying modifiable risk factors is crucial for skin cancer prevention.
  • Establishing causality for risk factors is challenging in traditional epidemiological studies.
  • Mendelian randomization (MR) offers a powerful approach to infer causal relationships.

Purpose of the Study:

  • To determine causal associations between potentially modifiable risk factors and skin cancer.
  • To investigate genetic liability for various risk factors in relation to melanoma, basal cell carcinoma (BCC), and squamous cell carcinoma (SCC).

Main Methods:

  • Utilized genetic instruments for 53 risk factors from genome-wide association studies.
  • Performed two-sample MR analyses using summary statistics for melanoma, BCC, and SCC.
  • Validated findings using multiple MR methods and replication datasets.

Main Results:

  • Genetic liability to sunburn, actinic keratosis, and prior skin cancers causally increased risk for all three skin cancer types.
  • Vitiligo showed a protective association, while higher nevus counts and occupational class were linked to increased melanoma risk.
  • Rheumatoid arthritis, type 2 diabetes, and physical activity were associated with lower BCC risk; BMI showed differential associations with BCC and SCC.

Conclusions:

  • Reaffirmed known risk factors and identified novel potential causal factors for skin cancer.
  • Highlights the need for further research into biological pathways and public health policy implications.
  • Suggests potential targets for skin cancer prevention strategies based on identified causal links.